a(0) = 1; for n >= 1, a(n) = A004185(a(n-1)*n).

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =12a(6) =27a(7) =189a(8) =1125a(9) =1125a(10) =1125a(11) =12357a(12) =124488a(13) =1134468a(14) =12255588a(15) =12333888a(16) =12234789a(17) =11234799a(18) =22222368a(19) =222224499a(20) =444448899a(21) =2333467899a(22) =12333567789a(23) =12234567789a(24) =222336666999a(27) =33333336a(28) =33333489a(29) =111666789